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dc.contributor.authorYe, Xinxin
dc.contributor.authorKang, Shenghong
dc.contributor.authorWang, Huimin
dc.contributor.authorLi, Hongying
dc.contributor.authorZhang, Yunxia
dc.contributor.authorWang, Guozhong
dc.contributor.authorZhao, Huijun
dc.date.accessioned2017-10-26T23:00:57Z
dc.date.available2017-10-26T23:00:57Z
dc.date.issued2015
dc.identifier.issn0304-3894
dc.identifier.doi10.1016/j.jhazmat.2015.02.052
dc.identifier.urihttp://hdl.handle.net/10072/100982
dc.description.abstractNatural diatomite was modified through facile acid treatment and ultrasonication, which increased its electronegativity, and the pore volume and surface area achieved to 0.211 cm3 g−1 and 76.9 m2 g−1, respectively. Modified diatomite was investigated to immobilize the potential toxic elements (PTEs) of Pb, Cu and Cd in simulated contaminated soil comparing to natural diatomite. When incubated with contaminated soils at rates of 2.5% and 5.0% by weight for 90 days, modified diatomite was more effective in immobilizing Pb, Cu and Cd than natural diatomite. After treated with 5.0% modified diatomite for 90 days, the contaminated soils showed 69.7%, 49.7% and 23.7% reductions in Pb, Cu and Cd concentrations after 0.01 M CaCl2 extraction, respectively. The concentrations of Pb, Cu and Cd were reduced by 66.7%, 47.2% and 33.1% in the leaching procedure, respectively. The surface complexation played an important role in the immobilization of PTEs in soils. The decreased extractable metal content of soil was accompanied by improved microbial activity which significantly increased (P < 0.05) in 5.0% modified diatomite-amended soils. These results suggested that modified diatomite with micro/nanostructured characteristics increased the immobilization of PTEs in contaminated soil and had great potential as green and low-cost amendments.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom210
dc.relation.ispartofpageto218
dc.relation.ispartofjournalJournal of Hazardous Materials
dc.relation.ispartofvolume289
dc.subject.fieldofresearchEngineering not elsewhere classified
dc.subject.fieldofresearchChemical Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode099999
dc.subject.fieldofresearchcode03
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode09
dc.titleModified natural diatomite and its enhanced immobilization of lead, copper and cadmium in simulated contaminated soils
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorZhao, Huijun


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